Coupling device



June 29 1948.

, J. c. WARWICK COUPLING DEVICE 2 Sheets-Sheet 1 Filed Nov. 30, 1945Z-Fm ATTORNEY Patented June 29, 1948 UNITED ,s TA'l'ES PATENT-A OFFICE gdairies C. WarwSiZZZ e e cShEZZ Sh T assignor to Radio Corporation ofDelaware Application November 30, 1943; Serial No. 512,321 T Claims.(01. lea-'30) This invention relates to a new and useful escapementdevice having tworotating members, one serving as a driving member andthe other as a driven membenboth members rotating on the same axis, a

An object of i this invention is to provide a coupling means whereby theangular relation of the twomembers' may be changed in predeterminedsteps through 360 degrees Without fully uncoupling or stopping theirrotation 'Another object of this invention is to provide a couplingmechanism which is particularly adapted for use with thesynchronouslydriven auto base whenemployed in four channel time division multiplexprinting apparatus.

A feature of this invention is a novel coupling mechanismwhich has arotating driving member equipped with a plurality of angularly spacedengaging pins, the spacing of which. may be arranged at predeterminedconstant or varied intervals around its periphery. A rotating drivenmember has means located thereon for making mechanical coupling with theengaging pins of the driving member.

"This invention will best be understood by referring to, theaccompanying drawings in which:

Fig. 1 is a side elevation of the coupling dev1ce,. a. it 1 ig. 2 is asection, the linebeingtaken through A-AofFig.1,

i .Fig. 3 isa partial sectionthrough line B-r-B Fig 4 is a partial planView" of Fig. 3; Fig. 5 is a sectional view of a the coupling device ofthisinvention L Fig fiis an end elevationof Fig.5, and

Fig; 7is ad etail plan View of Fig. 5.

Referringnow in'detail to Figs. 1, 2, 3 and i of 1 the, drawings, thecoupling device of this invention consists mainly of two members, one adriving member A and the other .a driven memberB; "The drivingdnember Aincludes a disc I which is keyed to a shaft Z and iss lidable along itsaxis, The disc I has pins or protrusions 3, QA and 3B angularly spacedat predetermined constant or variedintervals around itsjperiphery, asmay be desired, to drive the driven member B The disc I has a groove 3,which is cut arounditslouter periphery for engagement with rollers 'f-iarranged on forked actuatinglever 6. A spring "l surrounds shaft 2 andis arranged to urge the disc I to normal rest" against a key a in a slotzejs if is retainedin posii a s a' r ne. bi. alwe s i e a d sc'rewlBfiThe actuatinglevert is pivoted by modification of America, a corporationof i Q MP1 a pivot screw 5A. The extreme lend of lever"6 isprovidedwith'a helical tension spring 8 which urges the lever to anormalvertical'restposition. 'The driven member Bficomprises a" disc l0 fixedrigidly to a shaft H by means offia pin HA. The disc l0 carries-aispringtoggle ring i2which is pivoted ontdiscrlllby means of two pins 13. Onthe outer edge of the springetoggle ring l2 and located degrees apartfrom each.

other are two extending dogs 14. One endof each dog I4 is notched toprovide a round sur-: face l9. These dogs are arranged so that a-linedrawn parallel to the workingsurface-14AM the dogs is-vat right anglesto the pivot pins; I3. The toggle ring I2 is urgedto its rest-positionbymeans of two compression springsiali which are seated and retainedbyspherical headed pins l6. The extreme end-of-disc L0 isprovidedwithshoulder portion Orr-which are securedtwo strips llcarryingadjusting screws 18 for ads justing the travel of thetogglering. l2. s

In the operation of this mechanism in the nor.-: mal running condition,a pin or protrusion 3 is seated in thenotched'end of one of the dogs [4.The driving-force from one member to the other is transmitted throughthe contact between the pin and the surface I do on dog, l4. Whenever itis desired to change the angular relation be tween the two rotatingmembers A audit, the actuating lever 5 is rotated slightly clockwise bymanual, electrical, or mechanical means so as to move the drivingmembern toward the driven member B .againstzthe pressure of spriiig l.The electrical means may. be associated with the magnetsof a multiplexprinting system; The pin 3 which engages dog: l4 will e gert a fierceagainst the surface :19 she thus will rotate ring 52 about. pins I3until the springsl'5"areforcedl past their normal vertical center. Thusthe toggle ring 12 assumes a new posi tion wit lij tih' first mentioneddogf I 4, previouslyf' had just beenin driving 'contac't"withpin orpro-- trusion 3 on memberAfinow retracted, and'the opposite dog pushedforward Now weenie pressure is removed'froin the actuating lever 6springs l and 8 urge lever'fif and member A to thenormal position! Thetogglering; how

the above mentioned operation the driven mem ranged to mesh with adriven pinion gear 24 which is mounted upon a driven shaft 25. The

spur gear 23 has its outer surface counterbored at 26 in which afriction clutch disc member 21 is located. A clutch disc 28 having ashouldered portion 29 is fastened to shaft 20 by means of a pin 39 andis arranged so that disc 28 can be frictionally engaged with disc 21 ongear 23. The disc II], which is of the same general construction as thatdisclosed in Figs. 1, 2, 3 and 4, includes spring toggle ring 12, whichis pivoted on disc IOby means of two pins l3. The outer edge of ring 12also carries two dogs l4. One end of each dog is notched to provide around surface l9. The toggle ring I2 is urged to its rest positions bysprings l which are seated and retained by-sph'erical headed pins I6secured to ring l2 and disc Ill. A shouldered portion 3! has locatedthereon 'a disc 32 which serves as a stop cam. The surface of disc 32adjacent the toggle ring [.2 is provided with two adjusting screws 33for adjusting the travel of toggle ring l2. The clutch disc 34 has ashouldered keyed portion 35 which engages slotted collar 31, the slotand key portions being retained in friction-a1 engagement with disc 32by means of a helical spring 36 which which is retained on shaft 20 by ashoulder on collar 31. The collar 31 is retained. to rotate with shaft20 by means of a set screw 38. A release arm 40 has its rear portion 4|pivoted by a screw MA. The front portion of arm 43 has an extendingportion 42 which engages with a slot in stop cam 32. Spring 43, fixed atone end to a post Si in base 60, and at the other end to the release arm4!], holds the extending portion 42 in position'to engage the stop cammember 32. The driving disc 2| has a groove 22 which is cut around itsouter periphery for engagement with rollers 41 arranged on a forkedactuating arm 44.

F The actuating arm 44 has a yoke portion 45 and is pivotedat 45 by ascrew 46A on a support 52. The rollers 41 are arranged to engage in slot22 of driving disc 2|. A spring 48 retains the actuating arm 44 in itsnormal position. The driving disc 2| is provided with a helical spring49 which urges it to normal rest against spur gear 23. Floating member59 is a thrust ball bearing to reduce friction between members A and B.

v The step by step operation ofthisdevice is similar to the operationmentioned above in connection with the device shown by Figs. 1, 2, 3

and 4, except thatin addition member B, which includes the stop cam disc32, may be held stationary by having the extending portion of arm 40engage in the slot of stop cam disc 32 while step-by-step rotation isproduced in member A (and consequently in driven member C through gears23 and 24') by the actuation of arm 45, or when desired a continuousrotation may be produced in the driven member. C by permitting member B,through the engagement with clutch to rotate with member A in its normalposiion.

While I have indicated and described a system of my invention, it willbe apparent to one skilled in the art that my invention is by no meanslimited to the particular devices shown and de-..

scribed, but that many modifications may be made Without departing fromthe scope of my invention.

What I claim is:

' 1. A. coupling device comprising a driving disc member having aconcentric groove located on its outer periphery, a plurality of spacedprojecting pins located adjacent said groove, a driven disc member, aspring toggle ring pivotally mounted on said driven disc member, a shaftfor said driVing disc member, said ring having engaging means locatedthereon for engaging said projecting pins, a shaft for said driven discmember, each shaft being mounted coaxially with respect to the other,and engaging means including a forked actuating lever having an endpositioned in said concentric groove to move said driving disc on itsshaft to disengage the projecting pins with the engaging means to changethe angular relationship of said driven disc member with respect to saiddriving disc member.

2. A coupling device comprising a driving disc member having spacedengaging pins and a concentric groove located on its outer periphery, adriven disc member having a spring to gle ri pivotally located thereon,said ring havin engaging means located thereon for engaging said pins, ashaft for said driving disc member, a shaft for said driven disc member,each shaft being mounted coaxially with respect to the other, andengaging means positioned in said concentric gr ove to move said drivindisc on its shaft to disengage the pins with the engaging means tochange the angular relationship of said driven disc member with respectto said driving disc member.

3. A coupling device for use With a four channel time division multiplexprinter comprising a driving disc member having a concentric groovelocated on its outer periphery, a plurality of engagin pins locatedadjacent said concentric groove, a driven disc member, a spring togglering pivotally mounted on said driven disc member, said ring havingengaging means located thereon for engaging said engaging pins, a shaftfor said drivin disc member, shaft for said driven disc member, eachshaft being mounted coaxially with respect to the other, and engagingmeans positioned in said concentric groove to move said driving disc onits shaft to disengage the pins with the engaging means on said ring tochange the angular relationship of said driven disc member with respectto said driving disc member. V

4. A coupling device of the escapement type comprising a driving discmember having a concentric groove located on its outer periphery, aplurality of spaced projectin pins located adjacent said groove, adriven disc member having a, spring toggle rin mounted by a pair ofpivots on said driven disc member, said spring to gle ring havingengaging means located thereon for engaging said projecting pins, ashaft for said drivin member, a shaft for said driven disc member, oneof said shafts being mounted coaxially with respect to the other, andengaging means positioned in said concentric groove to move said drivingdisc on its shaft to disengage the projectin pins with the engagingmeans to change the angular relationship of said driven disc member withrespect to said driving disc member.

5. A coupling device comprising a driving disc member having a,concentric groove located on its periphery, a plurality of spacedprojecting pins located adjacent said groove, a driven disc member, aspring toggle ring mounted by a pair of pivots on said driven discmember, said ring having engaging means located thereon for engagingsaid projectin pins, a spring member surrounding a portion of the shaftof said driving disc member and being interposed between said drivingdisc and the end of said shaft, a shaft for said driven disc member, oneof said shafts being mounted coaxially with respect to the other, andengaging means positioned in said concentric groove to compress saidspring to move said driving disc to disengage the pins with the engagingmeans to change the angular relationship of said driven disc member withrespect to said driving disc member.

JAMES C. WARWICK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 839,334 Sutton Dec. 25, 19061,197,802 DeLaney Sept. 12, 1916 1,273,764 Garrett July 23, 19182,205,838 Redd June 25, 1940' 2,253,842 Brotman Aug. 26, 1941 2,314,193Boor Mar. 16, 1943

